MYSQL to XML Provider

Hi there, I have a lot of posts I did with my blog setup with MySQL data provider, is there anything I can do to take those posts and convert them to just using XML provider (default provider on new installs?) I would really like to get away from having
to use my MySQL db from here on out, but don't want to lose everything. (My site has rank of 3 and Google has a lot of my "post" urls cached.